Muscle Contraction and Origin-Insertion Quiz
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Questions and Answers

Which type of muscle causes lateral flexion, bending of the back, neck or head?

  • Origin
  • Contraction (correct)
  • Antagonist
  • Synergist

    • What happens when a muscle shortens?

  • Its insertion moves toward its origin (correct)
  • Its fibers become shorter
  • Its origin moves toward its insertion
  • Its fibers become longer

    • How are muscles named?

  • By their location
  • By their shape (correct)
  • By their size
  • By their direction of muscle fibers

    • How many origin points does the tricep muscle have?

    <p>3</p> Signup and view all the answers

    What innervates the masseter and temporalis muscles?

    <p>Mandibular division</p> Signup and view all the answers

    Which muscle controls the extension of the thigh?

    <p>Hamstring</p> Signup and view all the answers

    What is the most powerful muscle group?

    <p>Gluteus maximus</p> Signup and view all the answers

    What is the weakest muscle group?

    <p>Calf muscle</p> Signup and view all the answers

    What does the nervous system do?

    <p>Coordinates body movements</p> Signup and view all the answers

    What is sensory input?

    <p>Information gathered by sensory receptors</p> Signup and view all the answers

    Which part of the nervous system carries impulses to and from the spinal cord and brain?

    <p>Central Nervous System</p> Signup and view all the answers

    What is the function of motor output in the nervous system?

    <p>Transmit impulses from CNS to effector organs</p> Signup and view all the answers

    Which type of glial cell supports and braces neurons, as well as anchors them?

    <p>Astrocytes</p> Signup and view all the answers

    What is the function of microglia in the nervous system?

    <p>Monitoring nearby neurons' health</p> Signup and view all the answers

    Which part of the neuron is responsible for receiving input signals?

    <p>Dendrites</p> Signup and view all the answers

    What is the function of the axon in a neuron?

    <p>Generating and conducting nerve impulses</p> Signup and view all the answers

    What is the function of myelin in nerve fibers?

    <p>Conducting nerve impulses rapidly</p> Signup and view all the answers

    What is the difference between white matter and gray matter in the nervous system?

    <p>White matter consists of myelinated fibers, while gray matter consists of nerve cell bodies and unmyelinated fibers</p> Signup and view all the answers

    What is a synapse in the nervous system?

    <p>A junction that mediates information transfer between neurons or from a neuron to an effector organ</p> Signup and view all the answers

    What does the abbreviation 'ASME' stand for in the context of the nervous system?

    <p>Afferent/Sensory; Motor/Efferent</p> Signup and view all the answers

    Study Notes

    Muscle Function and Anatomy

    • Lateral flexion, bending of the back, neck, or head is caused by oblique muscles.
    • When a muscle shortens, it contracts.
    • Muscles are typically named based on their origin and/or insertion points, shape, function, or location.
    • The tricep muscle has three origin points.
    • The masseter and temporalis muscles are innervated by the trigeminal nerve (cranial nerve V).
    • The quadriceps femoris muscle controls the extension of the thigh.

    Nervous System

    • The most powerful muscle group is the gluteal muscles.
    • The weakest muscle group is the muscles of the middle ear.
    • The nervous system receives, processes, and responds to sensory input from the environment.
    • Sensory input refers to information gathered from the environment via sensors (e.g., eyes, ears, skin).
    • The central nervous system (CNS) carries impulses to and from the spinal cord and brain.
    • Motor output in the nervous system refers to the transmission of signals from the CNS to muscles and glands.

    Glial Cells and Neuron Function

    • Astrocytes are a type of glial cell that supports and braces neurons, as well as anchors them.
    • Microglia are a type of glial cell that functions as immune cells, protecting the nervous system from infection.
    • The dendrites of a neuron are responsible for receiving input signals.
    • The axon of a neuron is responsible for transmitting output signals away from the cell body.
    • Myelin in nerve fibers facilitates the transmission of signals by increasing the speed of impulse conduction.
    • White matter in the nervous system is composed of myelinated nerve fibers, while gray matter is composed of unmyelinated nerve fibers and neuron cell bodies.
    • A synapse is the small gap between the terminal end of one neuron and the dendrites of another neuron, where chemical signals are transmitted.
    • ASME in the context of the nervous system stands for Axon, Soma, Myelin, and Endoneurium.

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    Description

    Test your knowledge on muscle contraction and relaxation, as well as the relationship between muscle origin and insertion. This quiz will cover topics such as lateral flexion, bending of the back, neck, or head, and the movement of muscle attachments.

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